Stock Trading Canary

Built: 2026-10-19T16:02:49+00:00 · 中文

← South Korea

SOUTH KOREA · OPENDART

TOMATOSYSTEM Co., Ltd.

토마토시스템 · 393210 · KOSDAQ · Technology · Information Technology Services

Score

Not ranked: no net buying on the exchange by an individual insider in the last 180 days.

Insider timeline

2 insiders bought within 4 days, 28 Jul to 31 Jul: 2 CEO / chair. The share closed at 2,075.00 on the first of those days and at 3,280.00 most recently (+58.1%).

Several insiders within 15 days: 2026-07-28 – 2026-07-31Park Sung JunPark Sung JunMember of the executive committeeExecutiveJo Kil JuJo Kil JuChief Executive OfficerCEO / chairLee Gang ChanLee Gang ChanChief Executive OfficerCEO / chair2026-07-22 · Park Sung Jun · sale · 10,550,000 KRW2026-07-23 · Park Sung Jun · sale · 21,850,000 KRW2026-09-07 · Park Sung Jun · sale · 5,668,904 KRW2026-09-08 · Park Sung Jun · sale · 8,067,075 KRW2026-09-09 · Park Sung Jun · sale · 7,026,348 KRW2026-09-16 · Park Sung Jun · sale · 12,328,757 KRW2026-09-17 · Park Sung Jun · sale · 11,971,200 KRW2026-09-18 · Park Sung Jun · sale · 4,099,062 KRW2026-09-21 · Park Sung Jun · sale · 127,500,000 KRW2026-07-28 · Jo Kil Ju · purchase · 21,300,000 KRW2026-07-29 · Lee Gang Chan · purchase · 221,560 KRW2026-07-30 · Lee Gang Chan · purchase · 11,430,000 KRW2026-07-31 · Lee Gang Chan · purchase · 8,125,328 KRWMayJunJulAugSepOct

Tap an item for what it means.

●A purchase: the bigger the dot, the more was bought

Each dot is one insider's purchases on one day. The dot's area follows the amount: the largest purchase here gets the largest dot. Hold the pointer over a dot to see the date and the amount.

×A sale

A cross is one insider's sales on one day. People sell to pay tax, to cash in share awards or to hold less of one company, so a sale says less than a purchase does. When someone bought and sold on the same day, the cross sits beside the dot. The totals are under “Purchases against sales” below.

▮Purple band: several insiders bought within 15 days

The band marks the stretch with the most different buyers: at most 15 days long and at least two people. Here it is 28 Jul – 31 Jul, with 2 insiders. Only the strongest stretch is marked. Several people deciding the same thing is harder to explain by one person's private reasons, but insiders often buy together just after a closed period ends, so compare it with the grey weekly bars.

Blue line: this share's price, −28.5% over these six months

The closing price of each day, from 4,585.00 on 2026-04-21 to 3,280.00 on 2026-10-16. The line has no scale; read it for high and low: a dot on a low stretch was bought cheaply, a dot on a high stretch was not.

Dashed line: the typical stock on the same exchange, −31.9%

Taken from the 1525 other stocks on the same exchange that this site holds prices for. Each is measured from the first day of the window, and every day the middle one is drawn. It starts where the blue line starts, so the gap between the two is the difference: this share −28.5%, the typical one −31.9%, 3.4 points ahead. It is not an index and not a comparison within one industry.

This company: insiders buying per month, last 12 months

Nov
Dec
Jan
Feb
Mar
1Apr
May
Jun
2Jul
Aug
Sep
Oct

Darker bars are inside the 180-day window above.

Who traded

InsiderRolePurchasesSalesBoughtFirst purchaseShare price since
Park Sung JunExecutive—9———
Jo Kil JuCEO / chair1—21.3M KRW2026-07-28+58.1%
Lee Gang ChanCEO / chair3—19.8M KRW2026-07-29+72.0%

Purchases against sales

16%purchases
Purchases16%41.1M KRW · 4 line(s) · 2 insider(s)
Sales84%209.1M KRW · 9 line(s) · 1 insider(s)

Shares of the reported value of insider transactions in the 180-day window. Sales include disposals for tax, at option exercise or under a pre-set plan, which say little about an insider's view. The split describes what was disclosed; it is not a signal.

Insiders' buying price vs the latest close

Insiders paid 2,234.69 KRW a share on average (5 purchase lines, 3 buyers, 2026-04-06 – 2026-07-31). The close on 2026-10-16 was 46.8% above that price.

The latest purchase (2026-07-31) was at 2,092.00 KRW; the close was 56.8% above that price.

Prices paid are weighted by shares and taken from the filings; dividends are not counted. Not scored.

Insider trades on the exchange

Purchases and sales on the exchange in the last 12 months. The filing gives the settlement date; the trade date is two trading days earlier.

Trade dateInsiderRoleTradeSharesPriceValueFiling
2026-09-21Park Sung JunSenior managing directorSold on the exchange50,000₩2,550₩127.5MDART ↗
2026-09-18Park Sung JunSenior managing directorSold on the exchange1,903₩2,154₩4.1MDART ↗
2026-09-17Park Sung JunSenior managing directorSold on the exchange5,504₩2,175₩12.0MDART ↗
2026-09-16Park Sung JunSenior managing directorSold on the exchange5,627₩2,191₩12.3MDART ↗
2026-09-09Park Sung JunSenior managing directorSold on the exchange3,262₩2,154₩7.0MDART ↗
2026-09-08Park Sung JunSenior managing directorSold on the exchange3,709₩2,175₩8.1MDART ↗
2026-09-07Park Sung JunSenior managing directorSold on the exchange2,524₩2,246₩5.7MDART ↗
2026-07-31Lee Gang ChanCEOBought on the exchange3,884₩2,092₩8.1MDART ↗
2026-07-30Lee Gang ChanCEOBought on the exchange6,000₩1,905₩11.4MDART ↗
2026-07-29Lee Gang ChanCEOBought on the exchange116₩1,910₩221,560DART ↗
2026-07-28Jo Kil JuCEOBought on the exchange10,000₩2,130₩21.3MDART ↗
2026-07-23Park Sung JunSenior managing directorSold on the exchange10,000₩2,185₩21.9MDART ↗
2026-07-22Park Sung JunSenior managing directorSold on the exchange5,000₩2,110₩10.6MDART ↗
2026-04-06Kim Dae-heonDirectorBought on the exchange1,960₩4,080₩8.0MDART ↗
Other changes in holdings · 17

Option exercises, grants, new shares, inheritance, gifts, off-exchange trades and trades by companies and funds. Not counted in the score.

DateInsiderRoleReasonSharesFiling
2026-06-02Park Sung JunSenior managing directorDonation(-)38,000DART ↗
2026-06-02Park Sung JunSenior managing directorDonation(-)32,500DART ↗
2026-06-02Park Sung JunSenior managing directorDonation(-)32,501DART ↗
2026-06-02Park Sung JunSenior managing directorDonation(-)37,501DART ↗
2026-03-01Park Ju WanDirectorNew report(+)2,595DART ↗
2026-03-01JEEEYUL LEEDirectorNew report(+)4,120DART ↗
2025-12-16Lee Sang DonExecutiveDonation(-)32,010DART ↗
2025-11-25Lee Sang DonExecutiveDonation(-)1,880DART ↗
2025-11-24Jo Kil JuCEOReceipt of donation(+)156,145DART ↗
2025-11-24Lee Sang DonExecutiveDonation(-)156,145DART ↗
2025-11-24Lee Sang DonExecutiveDonation(-)117,400DART ↗
2025-11-24Lee Sang DonExecutiveDonation(-)78,073DART ↗
2025-11-24Kim Dae-heonDirectorReceipt of donation(+)1,280DART ↗
2025-11-24Kim Jae HyukDirectorReceipt of donation(+)1,460DART ↗
2025-11-24HUR TAE JOOSenior managing directorReceipt of donation(+)460DART ↗
2025-11-24Seo Jung HoonManaging directorReceipt of donation(+)500DART ↗
2025-11-24CHOI YOUNG GEUNDirectorReceipt of donation(+)360DART ↗